diff --git a/include/array_view.h b/include/array_view.h
index e4ffe5d..89a22f7 100644
--- a/include/array_view.h
+++ b/include/array_view.h
@@ -75,7 +75,7 @@ namespace details
 	class coordinate_facade
 	{
 		static_assert(std::is_integral<ValueType>::value
-            && !std::is_signed<ValueType>::value
+			&& !std::is_signed<ValueType>::value
 			&& sizeof(ValueType) <= sizeof(size_t), "ValueType must be unsigned integral type!");
 		static_assert(Rank > 0, "Rank must be greater than 0!");
 
@@ -1630,9 +1630,9 @@ namespace details
 template <typename ValueType, typename SizeType>
 struct array_view_options
 {
-    static_assert(std::is_integral<SizeType>::value
-                  && !std::is_signed<SizeType>::value
-                  && sizeof(SizeType) <= sizeof(size_t), "size_type must be unsigned integral type!");
+	static_assert(std::is_integral<ValueType>::value
+		&& !std::is_signed<ValueType>::value
+		&& sizeof(ValueType) <= sizeof(size_t), "ValueType must be unsigned integral type!");
 
 	struct array_view_traits
 	{